Thermal measuring and testing – Temperature measurement – By a vibratory effect
Patent
1996-10-16
1999-09-14
Williams, Hezron
Thermal measuring and testing
Temperature measurement
By a vibratory effect
374139, 73597, 73599, 73644, G01K 1122, G01N 2918, G01N 2920
Patent
active
059511630
ABSTRACT:
Ultrasonic sensors and associated methods for on-line monitoring of material properties for die casting, molding and extrusion processes at elevated temperatures are disclosed. The sensors include the use of ultrasonic waveguides embedded in the processing machines and piezoelectric ultrasonic transducers. The sensors are operated in the reflection geometry in which one side access of the processing machines is required. The monitoring parameters are the flow front, gap development and temperature of the materials being processed and filled in the cavities of the die in casting processes and the mold in injection molding, and the temperature and viscosity of the molten polymers in the polymer extrusion machines. Piezoelectric ultrasonic transducers made of high Curie temperature materials, fabricated by sol-gel techniques and directly deposited on top of the ultrasonic waveguides or the external walls of the shot sleeve of the die caster, die of the die caster, mold of the injection molding machine or barrel of the extruder are also used.
REFERENCES:
patent: 3444726 (1969-05-01), Young et al.
patent: 3456715 (1969-07-01), Freedman et al.
patent: 3999433 (1976-12-01), Japlin
patent: 4509360 (1985-04-01), Erwin et al.
patent: 4981045 (1991-01-01), Mountford
patent: 5135295 (1992-08-01), Cheng-Kuei et al.
patent: 5159838 (1992-11-01), Lynnworth
patent: 5161594 (1992-11-01), Bolton et al.
patent: 5286109 (1994-02-01), Hanscombe et al.
patent: 5384079 (1995-01-01), Bur et al.
patent: 5433112 (1995-07-01), Piche et al.
patent: 5489402 (1996-02-01), Knoblauch et al.
patent: 5708209 (1998-01-01), Stiffler et al.
Digital Real-Time Control of the Die Casting Process Dr. Marcel Loher, Leo Iten.
In Situ Monitoring of Molding Processes Using Laser Based Ultrasound--Addison et al, Rockwell Int. Science Centre, 1049 Camino Dos Rios, Thousand. Oaks, CA 91360 1994.
In-line phase modular using coaxial thick lead zirconate titanate coated optical fibers--D.A. Barrow et al J. Appl. Phys. 79 (6) Mar. 15, 1996.
Cao Bin
Jen Cheng-Kuei
Loong Chee Ang
Nguyen Ky Thanh
Wang Hao
Miller Rose M.
National Research Council of Canada
Williams Hezron
LandOfFree
Ultrasonic sensors for on-line monitoring of castings and moldin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic sensors for on-line monitoring of castings and moldin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic sensors for on-line monitoring of castings and moldin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1502225